c-common.c (flag_abi_version): Default to 2.

	* c-common.c (flag_abi_version): Default to 2.
	* c-cppbuiltin.c (c_cpp_builtins): Define __GXX_ABI_VERSION
	uniformly for versions above 2.
	* doc/invoke.texi: Update documentation for -fabi-version.

	* cp-lang.c (cp_expr_size): Return zero for empty classes.

	* cp-tree.h (warn_if_uknown_interface): Remove unused function.
	* decl2.c (warn_if_unknown_interface): Likewise.

	* g++.dg/abi/macro0.C: New test.
	* g++.dg/abi/macro1.C: Likewise.
	* g++.dg/abi/macro2.C: Likewise.

	* g++.dg/abi/bitfield5.C: Add explicit -fabi-version=1 option.
	* g++.dg/abi/bitfield7.C: Likewise.
	* g++.dg/abi/dtor2.C: Likewise.
	* g++.dg/abi/mangle11.C: Likewise.
	* g++.dg/abi/mangle12.C: Likewise.
	* g++.dg/abi/mangle14.C: Likewise.
	* g++.dg/abi/mangle17.C: Likewise.
	* g++.dg/abi/vbase10.C: Likewise.
	* g++.dg/abi/vbase14.C: Likewise.
	* g++.dg/template/qualttp17.C: Likewise.

From-SVN: r74973

22 files changed, 85 insertions, 34 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 768fce9..86135fb 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2003-12-23  Mark Mitchell  <mark@codesourcery.com>
+
+	* c-common.c (flag_abi_version): Default to 2.
+	* c-cppbuiltin.c (c_cpp_builtins): Define __GXX_ABI_VERSION
+	uniformly for versions above 2.
+	* doc/invoke.texi: Update documentation for -fabi-version.
+
 2003-12-22  Geoffrey Keating  <geoffk@apple.com>
 
 	* config/rs6000/rs6000.md: Change many instances of '!
diff --git a/gcc/c-common.c b/gcc/c-common.c
index ce90433..9cdd144 100644
--- a/gcc/c-common.c
+++ b/gcc/c-common.c
@@ -609,10 +609,12 @@ int flag_enforce_eh_specs = 1;
 
     1: The version of the ABI first used in G++ 3.2.
 
+    2: The version of the ABI first used in G++ 3.4.
+
     Additional positive integers will be assigned as new versions of
     the ABI become the default version of the ABI.  */
 
-int flag_abi_version = 1;
+int flag_abi_version = 2;
 
 /* Nonzero means warn about things that will change when compiling
    with an ABI-compliant compiler.  */
diff --git a/gcc/c-cppbuiltin.c b/gcc/c-cppbuiltin.c
index 19a9cf4..739a342 100644
--- a/gcc/c-cppbuiltin.c
+++ b/gcc/c-cppbuiltin.c
@@ -310,7 +310,23 @@ c_cpp_builtins (cpp_reader *pfile)
 
   /* represents the C++ ABI version, always defined so it can be used while
      preprocessing C and assembler.  */
-  cpp_define (pfile, "__GXX_ABI_VERSION=102");
+  if (flag_abi_version == 0)
+    /* Use a very large value so that:
+
+         #if __GXX_ABI_VERSION >= <value for version X>
+
+       will work whether the user explicitly says "-fabi-version=x" or
+       "-fabi-version=0".  Do not use INT_MAX because that will be
+       different from system to system.  */
+    builtin_define_with_int_value ("__GXX_ABI_VERSION", 999999);
+  else if (flag_abi_version == 1)
+    /* Due to an historical accident, this version had the value
+       "102".  */
+    builtin_define_with_int_value ("__GXX_ABI_VERSION", 102);
+  else
+    /* Newer versions have values 1002, 1003, ... */
+    builtin_define_with_int_value ("__GXX_ABI_VERSION", 
+				   1000 + flag_abi_version);
 
   /* libgcc needs to know this.  */
   if (USING_SJLJ_EXCEPTIONS)
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 69cbbed..9d13f3d 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,10 @@
+2003-12-23  Mark Mitchell  <mark@codesourcery.com>
+
+	* cp-lang.c (cp_expr_size): Return zero for empty classes.
+
+	* cp-tree.h (warn_if_uknown_interface): Remove unused function.
+	* decl2.c (warn_if_unknown_interface): Likewise.
+
 2003-12-23  Nathan Sidwell  <nathan@codesourcery.com>
 
 	PR c++/13387
diff --git a/gcc/cp/cp-lang.c b/gcc/cp/cp-lang.c
index 94cf462..f1f5eed 100644
--- a/gcc/cp/cp-lang.c
+++ b/gcc/cp/cp-lang.c
@@ -347,7 +347,9 @@ cp_expr_size (tree exp)
 	abort ();
       /* This would be wrong for a type with virtual bases, but they are
 	 caught by the abort above.  */
-      return CLASSTYPE_SIZE_UNIT (TREE_TYPE (exp));
+      return (is_empty_class (TREE_TYPE (exp))
+	      ? size_zero_node 
+	      : CLASSTYPE_SIZE_UNIT (TREE_TYPE (exp)));
     }
   else
     /* Use the default code.  */
diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h
index ba97705..91e38f4 100644
--- a/gcc/cp/cp-tree.h
+++ b/gcc/cp/cp-tree.h
@@ -3710,7 +3710,6 @@ extern GTY(()) tree last_function_parms;
 /* in decl2.c */
 extern bool check_java_method (tree);
 extern int grok_method_quals (tree, tree, tree);
-extern void warn_if_unknown_interface (tree);
 extern void grok_x_components (tree);
 extern void maybe_retrofit_in_chrg (tree);
 extern void maybe_make_one_only	(tree);
diff --git a/gcc/cp/decl2.c b/gcc/cp/decl2.c
index 92b661d..4068826 100644
--- a/gcc/cp/decl2.c
+++ b/gcc/cp/decl2.c
@@ -156,21 +156,6 @@ grok_method_quals (tree ctype, tree function, tree quals)
   return this_quals;
 }
 
-/* Warn when -fexternal-templates is used and #pragma
-   interface/implementation is not used all the times it should be,
-   inform the user.  */
-
-void
-warn_if_unknown_interface (tree decl)
-{
-  static int already_warned = 0;
-  if (already_warned++)
-    return;
-
-  cp_warning_at ("template `%#D' defined in file without #pragma interface",
-		 decl);
-}
-
 /* A subroutine of the parser, to handle a component list.  */
 
 void
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 012ec04..db5c0b0 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -1274,11 +1274,12 @@ Here is a list of options that are @emph{only} for compiling C++ programs:
 
 @item -fabi-version=@var{n}
 @opindex fabi-version
-Use version @var{n} of the C++ ABI.  Version 1 is the version of the C++
-ABI that first appeared in G++ 3.2.  Version 0 will always be the
-version that conforms most closely to the C++ ABI specification.
-Therefore, the ABI obtained using version 0 will change as ABI bugs are
-fixed.
+Use version @var{n} of the C++ ABI.  Version 2 is the version of the
+C++ ABI that first appeared in G++ 3.4.  Version 1 is the version of
+the C++ ABI that first appeared in G++ 3.2.  Version 0 will always be
+the version that conforms most closely to the C++ ABI specification.
+Therefore, the ABI obtained using version 0 will change as ABI bugs
+are fixed.
 
 The default is version 1.
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 985f926..7c5ee7f 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,20 @@
+2003-12-23  Mark Mitchell  <mark@codesourcery.com>
+
+	* g++.dg/abi/macro0.C: New test.
+	* g++.dg/abi/macro1.C: Likewise.
+	* g++.dg/abi/macro2.C: Likewise.
+
+	* g++.dg/abi/bitfield5.C: Add explicit -fabi-version=1 option.
+	* g++.dg/abi/bitfield7.C: Likewise.
+	* g++.dg/abi/dtor2.C: Likewise.
+	* g++.dg/abi/mangle11.C: Likewise.
+	* g++.dg/abi/mangle12.C: Likewise.
+	* g++.dg/abi/mangle14.C: Likewise.
+	* g++.dg/abi/mangle17.C: Likewise.
+	* g++.dg/abi/vbase10.C: Likewise.
+	* g++.dg/abi/vbase14.C: Likewise.
+	* g++.dg/template/qualttp17.C: Likewise.
+
 2003-12-21  Andrew Pinski  <pinskia@physics.uc.edu>
 
 	PR c/11995
diff --git a/gcc/testsuite/g++.dg/abi/bitfield5.C b/gcc/testsuite/g++.dg/abi/bitfield5.C
index eed76e6..e754f0d 100644
--- a/gcc/testsuite/g++.dg/abi/bitfield5.C
+++ b/gcc/testsuite/g++.dg/abi/bitfield5.C
@@ -1,5 +1,5 @@
 // { dg-do compile } 
-// { dg-options "-Wabi" }
+// { dg-options "-Wabi -fabi-version=1" }
 
 struct A { 
   virtual void f(); 
diff --git a/gcc/testsuite/g++.dg/abi/bitfield7.C b/gcc/testsuite/g++.dg/abi/bitfield7.C
index 9868cfc..b5b656f 100644
--- a/gcc/testsuite/g++.dg/abi/bitfield7.C
+++ b/gcc/testsuite/g++.dg/abi/bitfield7.C
@@ -1,5 +1,5 @@
 // { dg-do compile }
-// { dg-options "-Wabi" }
+// { dg-options "-Wabi -fabi-version=1" }
 
 union U { // { dg-warning "ABI" }
   int i: 4096; // { dg-warning "exceeds" }
diff --git a/gcc/testsuite/g++.dg/abi/dtor2.C b/gcc/testsuite/g++.dg/abi/dtor2.C
index f4a1336..6b89cc8 100644
--- a/gcc/testsuite/g++.dg/abi/dtor2.C
+++ b/gcc/testsuite/g++.dg/abi/dtor2.C
@@ -1,5 +1,5 @@
 // { dg-do compile }
-// { dg-options "-Wabi" }
+// { dg-options "-Wabi -fabi-version=1" }
 
 struct A {
   virtual void a ();
diff --git a/gcc/testsuite/g++.dg/abi/macro0.C b/gcc/testsuite/g++.dg/abi/macro0.C
new file mode 100644
index 0000000..6c391e6
--- /dev/null
+++ b/gcc/testsuite/g++.dg/abi/macro0.C
@@ -0,0 +1,5 @@
+// { dg-options "-fabi-version=0" }
+
+#if __GXX_ABI_VERSION != 999999
+#error "Incorrect value of __GXX_ABI_VERSION"
+#endif
diff --git a/gcc/testsuite/g++.dg/abi/macro1.C b/gcc/testsuite/g++.dg/abi/macro1.C
new file mode 100644
index 0000000..871208d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/abi/macro1.C
@@ -0,0 +1,5 @@
+// { dg-options "-fabi-version=1" }
+
+#if __GXX_ABI_VERSION != 102
+#error "Incorrect value of __GXX_ABI_VERSION"
+#endif
diff --git a/gcc/testsuite/g++.dg/abi/macro2.C b/gcc/testsuite/g++.dg/abi/macro2.C
new file mode 100644
index 0000000..9f0af9c
--- /dev/null
+++ b/gcc/testsuite/g++.dg/abi/macro2.C
@@ -0,0 +1,5 @@
+// { dg-options "-fabi-version=2" }
+
+#if __GXX_ABI_VERSION != 1002
+#error "Incorrect value of __GXX_ABI_VERSION"
+#endif
diff --git a/gcc/testsuite/g++.dg/abi/mangle11.C b/gcc/testsuite/g++.dg/abi/mangle11.C
index f715117..a049a95 100644
--- a/gcc/testsuite/g++.dg/abi/mangle11.C
+++ b/gcc/testsuite/g++.dg/abi/mangle11.C
@@ -1,4 +1,4 @@
-// { dg-options "-Wabi" }
+// { dg-options "-Wabi -fabi-version=1" }
 
 template <typename Q>
 void f (typename Q::X) {}
diff --git a/gcc/testsuite/g++.dg/abi/mangle12.C b/gcc/testsuite/g++.dg/abi/mangle12.C
index 772b58b..406a13b 100644
--- a/gcc/testsuite/g++.dg/abi/mangle12.C
+++ b/gcc/testsuite/g++.dg/abi/mangle12.C
@@ -1,4 +1,4 @@
-// { dg-options "-Wabi" }
+// { dg-options "-Wabi -fabi-version=1" }
 
 template <template <typename> class Q>
 void f (typename Q<int>::X) {}
diff --git a/gcc/testsuite/g++.dg/abi/mangle14.C b/gcc/testsuite/g++.dg/abi/mangle14.C
index 8e2bfdd..1205ac4 100644
--- a/gcc/testsuite/g++.dg/abi/mangle14.C
+++ b/gcc/testsuite/g++.dg/abi/mangle14.C
@@ -1,5 +1,5 @@
 // { dg-do compile }
-// { dg-options "-Wabi" }
+// { dg-options "-Wabi -fabi-version=1" }
 
 struct A {
   template <typename T> int f ();
diff --git a/gcc/testsuite/g++.dg/abi/mangle17.C b/gcc/testsuite/g++.dg/abi/mangle17.C
index 6f8e387..994da88 100644
--- a/gcc/testsuite/g++.dg/abi/mangle17.C
+++ b/gcc/testsuite/g++.dg/abi/mangle17.C
@@ -1,4 +1,4 @@
-// { dg-options "-Wabi" }
+// { dg-options "-Wabi -fabi-version=1" }
 
 enum E { e = 3 };
 
diff --git a/gcc/testsuite/g++.dg/abi/vbase10.C b/gcc/testsuite/g++.dg/abi/vbase10.C
index 3c110be..7683250 100644
--- a/gcc/testsuite/g++.dg/abi/vbase10.C
+++ b/gcc/testsuite/g++.dg/abi/vbase10.C
@@ -1,5 +1,5 @@
 // { dg-do compile }
-// { dg-options "-Wabi" }
+// { dg-options "-Wabi -fabi-version=1" }
 
 struct A { virtual void f(); char c1; };
 struct B { B(); char c2; };
diff --git a/gcc/testsuite/g++.dg/abi/vbase14.C b/gcc/testsuite/g++.dg/abi/vbase14.C
index 99290b8..320d5ba 100644
--- a/gcc/testsuite/g++.dg/abi/vbase14.C
+++ b/gcc/testsuite/g++.dg/abi/vbase14.C
@@ -1,4 +1,4 @@
-// { dg-options "-Wabi" }
+// { dg-options "-Wabi -fabi-version=1" }
 
 struct E1 {};
 struct E2 : public E1 {}; // { dg-warning "layout" }
diff --git a/gcc/testsuite/g++.dg/template/qualttp17.C b/gcc/testsuite/g++.dg/template/qualttp17.C
index 4766c53..4d79c9a 100644
--- a/gcc/testsuite/g++.dg/template/qualttp17.C
+++ b/gcc/testsuite/g++.dg/template/qualttp17.C
@@ -1,7 +1,7 @@
 // Copyright (C) 2001 Free Software Foundation
 // Contributed by Kriang Lerdsuwanakij <lerdsuwa@users.sourceforge.net>
 // { dg-do compile }
-// { dg-options "-fno-inline" }
+// { dg-options "-fno-inline -fabi-version=1" }
 
 struct A
 {